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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:

第36卷

期数:

2014年第02期

页码:

1-9

栏目:

基础地质与矿产地质

出版日期:

2014-06-15

文章信息/Info

Title:

Diagenetic Sequence of Low Porosity and Permeability Reservoirs from Nearshore Subaqeous Fan of Shahejie Formation in the Steep Slope  Zone of Chezhen Depression, Bohai Bay Basin

文章编号:

1672-6561(2014)02-0001-09

作者:

朱筱敏; 赵东娜; 姜淑贤; 葛家旺; 张守鹏; 韩雪芳; 刘新

1. 中国石油大学(北京)地球科学学院,北京 102249; 2. 中国石化胜利油田地质科学研究院,山东 东营 257015; 3. 中海石油(中国)有限公司天津分公司勘探开发研究院,天津 300452; 4. 中国石油渤海钻探工程公司,河北 任丘 062552

Author(s):

ZHU Xiao-min;  ZHAO Dong-na;  JIANG Shu-xian;  GE Jia-wang;  ZHANG Shou-peng;  HAN Xue-fang;  LIU Xin

1. School of Geosciences, China University of Petroleum, Beijing 102249, China; 2. Geological Scientific Research, Institute of SINOPEC Shengli Oilfield, Dongying 257015, Shandong, China; 3. Research Institute of Exploration and Development of CNOOC Tianjin Branch, Tianjin 300452, China; 4. CNPC Bohai Drillng Engineering Company Limited, Renqiu 062552, Hebei, China

关键词:

成岩作用; 成岩序列; 沙河街组; 陡坡带; 低渗储层; 孔隙类型; 车镇凹陷; 渤海湾盆地

Keywords:

diagenesis;  diagenetic sequence;  Shahejie Formation;  steep slope zone;  low permeability reservoir;  pore type;  Chezhen depression;  Bohai Bay Basin

分类号:

P618.130.2;TE122.2

DOI:

-

文献标志码:

A

摘要:

根据大量岩芯、薄片、扫描电子显微镜(SEM)和镜质体反射率等储层资料，探讨了渤海湾盆地车镇凹陷陡坡带沙河街组近岸水下扇砂体岩石学特征、储层物性特征、成岩作用类型及其特征、成岩阶段与成岩序列、储层孔隙类型与次生孔隙发育特征，分析了低孔低渗储层中次生孔隙(“甜点”)的形成条件及控制因素。结果表明：车镇凹陷陡坡带沙河街组近岸水下扇砂体由岩屑质长石砂岩构成，在埋藏过程中，储层经历了压实、胶结、溶解和交代等成岩作用，现今储层埋深2 000～3 800 m，储层处于中成岩阶段，总体上形成了低孔低渗储层；溶蚀作用对于改善储层质量起到了重要作用；主要在2 300～3 100 m 深度段的有机酸对长石颗粒的溶蚀以及形成的粒间和粒内孔隙不仅增加了储层孔隙度，而且提高了储层渗透率，改善了储层质量，孔隙度可达25%，渗透率达到50×10^-3 μm²，为油气富集高产提供了储集空间。总之，溶蚀作用及其形成的次生孔隙发育带对于预测有利储层是非常重要的。 

Abstract:

Based on the core, thin section, SEM and vitrinite reflectance data, the characteristics of lithology, physical properties, diagenesis, diagenetic stage and sequence, pore type, secondary pore for sand bodies of nearshore subaqueous fan of Shahejie Formation in the steep slope zone of Chezhen depression were discussed; formation condition and controlling factor of secondary pores (“sweet spot”) in reservoir with low porosity and permeability were analyzed. The results show that the sand bodies of nearshore subaqueous fan of Shahejie Formation in the steep slope zone of Chezhen depression are consisted of feldspathic sandstone, mainly experiencing compaction, cementation, dissolution and metasomatism in the burial diagenetic evolution, and the reservoir is in the middle diagenetic stage now with the burial depth of 2 000-3 800 m, and the reservoir has the characteristics of low porosity and permeability; the dissolution plays a significant role in improving reservoir quality during the burial diagenetic evolution in the mainly depth; the feldspar dissolution by organic acid in the depth of 2 300-3 100 m and the intergranular and intragranular pores increase the porosity and permeability of reservoir and improve the reservoir quality, and the porosity is up to 25% and the permeability is up to 50×10^-3 μm², so that the reservoir spaces contribute to petroleum accumulation and high yield. In general, dissolutions and secondary pore development zone are very important for predicting favorable reservoir.

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备注/Memo

备注/Memo:

收稿日期:2013-08-20
基金项目:国家科技重大专项项目(2011ZX05001-002-03,2011ZX05025-005-02)
作者简介:朱筱敏(1960-),男,江苏扬州人,教授,博士研究生导师,工学博士,E-mail:xmzhu@cup.edu.cn。

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更新日期/Last Update: 2014-07-08